<template>
	<div>
		<!-- 面包屑导航区 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
		  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
		  <el-breadcrumb-item>商品管理</el-breadcrumb-item>
		  <el-breadcrumb-item>添加商品</el-breadcrumb-item>
		</el-breadcrumb>
		<!-- 卡片视图区域 -->
		<el-card>
			<!-- 提示区域 -->			
			<el-alert title="添加商品信息" type="info" center  show-icon :closable="false"></el-alert>
            <!-- 步骤条 -->
			<el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
			  <el-step title="基本信息"></el-step>
			  <el-step title="商品参数"></el-step>
			  <el-step title="商品属性"></el-step>
			  <el-step title="商品图片"></el-step>
			  <el-step title="商品内容"></el-step>
			  <el-step title="完成"></el-step>
			</el-steps>
			<!-- tab栏区域 -->
			<el-form :model="addForm" 
			:rules="addFormRules" 
			ref="addFormRef" 
			label-width="100px" 
			label-position="top">
			<el-tabs v-model="activeIndex" 
			:tab-position="'left'" 
			:before-leave="beforeTabLeave"
			@tab-click="tabClicked">
			    <el-tab-pane label="基本信息" name="0">
					<el-form-item label="商品名称" prop="goods_name">
						<el-input v-model="addForm.goods_name"></el-input>
					</el-form-item>
					<el-form-item label="商品价格" prop="goods_price">
						<el-input v-model="addForm.goods_price" type="number"></el-input>
					</el-form-item>
					<el-form-item label="商品重量" prop="goods_weight">
						<el-input v-model="addForm.goods_weight" type="number"></el-input>
					</el-form-item>
					<el-form-item label="商品数量" prop="goods_number">
						<el-input v-model="addForm.goods_number" type="number"></el-input>
					</el-form-item>
					<el-form-item label="商品分类">
						  <el-cascader
						    v-model="addForm.goods_cat"
						    :options="catelist"
						    :props="{ expandTrigger: 'hover',label:'cat_name',value:'cat_id',children:'children' }"
						    @change="handleChange"></el-cascader>
					</el-form-item>
				</el-tab-pane>
			    <el-tab-pane label="商品参数" name="1">
				    <!-- 渲染表单的item项 -->
				    <el-form-item :label="item.attr_name" v-for="item in manyTableData"
					:key="item.attr_id">
					     <!-- 复选框组 -->
						 <el-checkbox-group v-model="item.attr_vals">
						     <el-checkbox border :label="cb" v-for="(cb,i) in item.attr_vals" :key="i"></el-checkbox>						
						   </el-checkbox-group>
					</el-form-item>
				</el-tab-pane>
			    <el-tab-pane label="商品属性" name="2">
					<el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
						<el-input v-model="item.attr_vals" ></el-input>
					</el-form-item>
				</el-tab-pane>
			    <el-tab-pane label="商品图片" name="3">
					<!-- action请求的后台api地址 -->
					<el-upload					
					  :action="uploadURL"
					  :on-preview="handlePreview"
					  :on-remove="handleRemove"
					  list-type="picture"
					  :headers="headerObj"
					  :on-success="handleSuccess">
					  <el-button size="small" type="primary">点击上传</el-button>
					 <!-- <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div> -->
					</el-upload>
				</el-tab-pane>
				<el-tab-pane label="商品内容" name="4">
					<!-- 富文本编辑器组件 -->
					<quill-editor v-model="addForm.goods_introduce"></quill-editor>
					<!-- 添加商品的按钮 -->
					<el-button type="primary" class="btn_add" @click="add">添加按钮</el-button>
				</el-tab-pane>
			</el-tabs>
			</el-form>
		</el-card>
		<!-- 图片预览对话框 -->
		<el-dialog
		  title="图片预览"
		  :visible.sync="previewVisible"
		  width="50%">
		  <img :src="previewPath" alt="" class="previewImg"/>
		</el-dialog>
	</div>
</template>

<script>
	import _ from 'lodash'
	export default{
		data(){
			return{
				activeIndex:'0',
				//添加商品的表单数据对象
				addForm:{
					goods_name:'',
					goods_price:0,
					goods_number:0,
					goods_weight:0,
					//商品所属的分类数组
					goods_cat:[],
					//图片的数组
					pics:[],
					// 商品的详情描述
					goods_introduce:'',
					attrs:[]
				},
				addFormRules:{
					goods_name:[
						  { required: true, message: '请输入商品名称', trigger: 'blur' }
					],
					goods_price:[
						  { required: true, message: '请输入商品价格', trigger: 'blur' }
					],
					goods_number:[
						  { required: true, message: '请输入商品数量', trigger: 'blur' }
					],
					goods_weight:[
						  { required: true, message: '请输入商品重量', trigger: 'blur' }
					]
				},
				//商品分类列表
				catelist:[],
				// 动态参数列表
				manyTableData:[],
				//静态属性列表数据
				onlyTableData:[],
				// upload上传地址
				uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
				// 图片上传组件的hearders请求头对象
				headerObj:{
					Authorization:window.sessionStorage.getItem('token')
				},
				previewPath:'',
				previewVisible:false
			}
		},
		created(){
			this.getCateList()
		},
		methods:{
			// 获取所有商品分类数据
			async getCateList(){
				const {data:res}=await
				this.$http.get('categories')
				if(res.meta.status!==200){
					return this.$message.error('获取商品分类数据错误')
				}
				this.catelist=res.data
				//console.log(res.data)
				//this.$message.success('获取商品分类数据成功')
			},
			// 级联选择器选中项
			handleChange(){
				if(this.addForm.goods_cat.length!==3){
					this.addForm.goods_cat=[]
				}
			},
			beforeTabLeave(activeName,oldActiveName){
				// console.log('即将离开的标签页名字是'+oldActiveName)
				// console.log('即将进入的标签页名字是'+activeName)
				if(oldActiveName==='0'&&this.addForm.goods_cat.length!==3){
					this.$message.error('请先选择商品分类！')
					return false
				}				
			},
			//切换标签的点击事件
			async tabClicked(){
				if(this.activeIndex==='1'){
					const {data:res}=await
					this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'many'}})
					if(res.meta.status!==200){
						return this.$message.error('获取动态参数列表失败')
					}
					res.data.forEach(item=>{
						item.attr_vals=
						item.attr_vals.length===0 ? [] : item.attr_vals.split(',')
					})
					this.manyTableData=res.data
				}
				else if(this.activeIndex==='2'){
					const {data:res}=await
					this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}})
					if(res.meta.status!==200){
						return this.$message.error('获取静态属性失败')
					}
					// res.data.forEach(item=>{
					// 	item.attr_vals=
					// 	item.attr_vals.length===0 ? [] : item.attr_vals.split(',')
					// })
					this.onlyTableData=res.data
					console.log(res)
				}
			},
			// 预览处理图片
			handlePreview(file){
				console.log(file)
				this.previewPath=file.response.data.url
				this.previewVisible=true
			},
			// 移除图片的操作
			handleRemove(file){
				//console.log(file)
				// 获取将要删除的图片的临时路径
				const filePath=file.response.data.tem_path
				// 从pics数组中找到这个图片对应的索引值
				const i=
				this.addForm.pics.findIndex(x=>x.pic===filePath)
				// 调用数组的splice方法,把图片信息对象从pics数组中移除
				this.addForm.pics.slice(i,1)
				//console.log(this.addForm)
			},
			//监听图片上传成功页面
			handleSuccess(response){
				//console.log(response)
				//拼接得到一个图片信息
				const picInfo={pic:response.data.tmp_path}
				//将图片信息对象push到pics数组中
				this.addForm.pics.push(picInfo)
				//console.log(this.addForm)
			},
			// 添加方法的校验
			add(){
				this.$refs.addFormRef.validate(async valid=>{
					if(!valid){
						return this.$message.error('请填写必要的表单项！')
					}
					//执行添加的业务逻辑
					// 使用lodash调用cloneDeep(加上要用的对象)
					const form=_.cloneDeep(this.addForm)
					form.goods_cat=
					form.goods_cat.join(',')
					// 处理动态参数
					this.manyTableData.forEach(item=>{
						const newInfo={attr_id:item.attr_id,attr_value:item.attr_vals.join(' ')}
						this.addForm.attrs.push(newInfo)
					})
					// 处理静态属性
					this.onlyTableData.forEach(item=>{
						const newInfo={attr_id:item.attr_id,attr_value:item.attr_vals}
						this.addForm.attrs.push(newInfo)
					})
					form.attrs=this.addForm.attrs
					//console.log(form)
					// 发起请求添加商品 商品名称必须是唯一的
					const {data:res}=await
					this.$http.post('goods',form)
					console.log(res)
					if(res.meta.status!==201){
						return this.$message.error('添加商品失败！')
					}
					
					this.$message.success('添加商品成功！')
					this.$router.push('/goods')
				})
			}
		},
		computed:{
			cateId(){
				if(this.addForm.goods_cat.length===3){
					return this.addForm.goods_cat[2]
				}
				return null
			}
		}
	}
</script>

<style scoped>
	.el-checkbox{
		margin: 0 5PX 0 0 !important;
		/* 上右下左 */
	}
	.previewImg{
		width: 100%;
	}
	.btn_add{
		margin-top: 15px;
	}
</style>
